For this you can use metal gusset plates and attach these with the help of nails and glue.
How to attach roofing to steel trusses.
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If you are installing the trusses with hand then it is very much important use effective tools to join all members perfectly.
As with rafter style roofs toenailing is one of the most common ways of attaching a truss style roof to a wall plate.
Position a level on the rafter of the truss and adjust the top of the truss in or out to center the bubble in the indicator.
If installing over green or damp lumber a positive vapor barrier must be installed to separate the wood from the sheet.
Nail a piece of 2 by 4 lumber diagonally from the inside of the rafter to the edge of the top plate with one nail in each end to hold the truss plumb or level from top to bottom.
Use galvanized nails to attach the insulation securely to each of the rafters.
This will ensure the good performance and long life of the metal.
Unroll the insulation with the vapor barrier side down.
Toenail a truss into the top of the wall plate by nailing through the sides of the bottom chord at a 30 degree angle.
Now when you are done with construction of roof trusses the only thing that you have to do is to take them to the roof safely.
Install plywood clips also called h clips at 24 inch intervals onto the upper edge of the first run of plywood by hand.
Fasten it to the first rafter then unroll it only as far as the next one before nailing it in place.
Additional caution must be.